Laser-welded article

a technology of laser welding and article, which is applied in the field of laser welding article, can solve the problems of reducing the welding strength affecting the resin property of the first resin workpiece, and restricting the use of any resin, so as to achieve excellent appearance and sufficient welding strength

Active Publication Date: 2013-09-17
ORIENT CHEM INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a laser-welded article that is easy to prepare and has strong welding strength and attractive appearance. It is made from resin and does not damage its properties. The article contains a small amount of nigrosine that has good solubility in the resin and a retardation effect, which ensures the article maintains its original resin properties. The article can be manufactured without any inconveniencies, such as pretreatments or complicated processes. Additionally, the article does not require any adhesive materials or clamps, which makes it recycling-friendly.

Problems solved by technology

Therefore, there is a problem that the resin property of the first resin workpiece is easily influenced by the additive.
Also, there are some other problems.
Depending on a sort of the resin and the additive, a separation of layers in the kneading procedure, a deterioration of strength of the welded article, and a restriction of using any resin are caused.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

(1-a) Preparation of Laser-Transmissible-Absorptive Molded Workpiece

[0087]499.9 g of a fiber-reinforced polyamide 6 resin of catalog No. ZYTEL 73G30L available from Du Pont that ZYTEL is a registered trademark and 0.1 g of nigrosine of catalog No. NUBIAN BLACK PA9801 available from Orient Chemical Industries, Ltd., which contains 0.75% of iron and 1.08% of aniline, and NUBIAN is a registered trademark, were added in a tumbler made of stainless steel and were mixed with stirring for 1 hour. The obtained mixture was molded at 280° C. of temperature of a cylinder and 80° C. of temperature of a metal mold with general procedures using an injection molding machine of catalog No. Si-50, which is available from Toyo Machinery & Metal Co., Ltd. Then a laser-transmissible-absorptive molded workpiece having the length of 80 mm, the width of 50 mm and the thickness of 1 mm was prepared.

(1-b) Preparation of Laser-Absorptive Molded Workpiece

[0088]499 g of the fiber-reinforced polyamide 6 resin o...

example 2

(2-a) Preparation of Laser-Transmissible-Absorptive Molded Workpiece

[0091]499.65 g of the fiber-reinforced polyamide 6 resin of catalog No. ZYTEL 73G30L available from Du Pont that ZYTEL is the registered trademark and 0.35 g of nigrosine of catalog No. NUBIAN BLACK PA9801 available from Orient Chemical Industries, Ltd that NUBIAN is the registered trademark were added in a tumbler made of stainless steel and were mixed with stirring for 1 hour. The obtained mixture was molded at 280° C. of temperature of a cylinder and 80° C. of temperature of a metal mold with general procedures using the injection molding machine of catalog No. Si-50, which is available from Toyo Machinery & Metal Co., Ltd. Then a laser-transmissible-absorptive molded workpiece having the length of 80 mm, the width of 50 mm and the thickness of 1 mm was prepared.

(2-b) Preparation of Laser-Absorptive Molded Workpiece

[0092]A laser-absorptive molded workpiece having the length of 80 mm, the width of 50 mm and the th...

example 3

(3-a) Preparation of Laser-Transmissible-Absorptive Molded Workpiece

[0094]499.65 g of the fiber-reinforced polyamide 6 resin of catalog No. ZYTEL 73G30L available from Du Pont that ZYTEL is the registered trademark and 0.35 g of nigrosine of catalog No. NUBIAN BLACK PA9803 available from Orient Chemical Industries, Ltd., which contains 0.26% of iron and 0.15% of aniline, and NUBIAN is the registered trademark, were added in a tumbler made of stainless steel and were mixed with stirring for 1 hour. The obtained mixture was molded at 280° C. of temperature of a cylinder and 80° C. of temperature of a metal mold with general procedures using the injection molding machine of catalog No. Si-50, which is available from Toyo Machinery & Metal Co., Ltd. Then a laser-transmissible-absorptive molded workpiece having the length of 80 mm, the width of 50 mm and the thickness of 1 mm was prepared.

(3-b) Preparation of Laser-Absorptive Molded Workpiece

[0095]A laser-absorptive molded workpiece havi...

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Abstract

A method of manufacturing laser-welded article having an integral construction of piled workpieces, that are welded by heat generated from irradiation with laser and include thermoplastic resin, a laser-transmissible-absorptive molded workpiece including a thermoplastic resin and 0.001 to 0.3 weight % of colorant consisting of nigrosine which has an absorption coefficient: ε for a ray of 940 nm ranging form 4000 to 7000, that transmits laser partially and absorbs laser partially, and a laser-absorptive molded workpiece including a thermoplastic resin and 0.1 to 5 weight % of diverse colorant comprising nigrosine and / or carbon black, that absorbs the laser.

Description

[0001]This is a Continuation of application Ser. No. 11 / 522,321 filed Sep. 18, 2006, which claims priority to Japanese Patent Application No. 2005-274000 filed Sep. 21, 2005. The disclosure of the prior applications is hereby incorporated by reference herein in their entirety.BACKGROUND OF THE INVENTION[0002]This invention relates to a laser-welded article that a laser-transmissible-absorptive molded workpiece including nigrosine alone as colorant and a laser-absorptive molded workpiece are welded by laser at a time and unified.[0003]For mutually joining workpieces made from a synthetic thermoplastic resin material, a method for laser welding is known.[0004]Such laser welding is executed for example as follows. As shown in FIG. 2, a laser-transmissible workpiece 11 is used for one workpiece and for the other workpiece, a laser-absorptive workpiece 12 is used. These workpieces are then put together. A laser 13 is irradiated from a side of the laser-transmissible workpiece 11 towards ...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): B29C65/16
CPCB29C65/16B29C65/1635B29C66/14B29C65/1658B29C65/1677B29C66/1122B29C66/1282B29C66/12841B29C66/43B29C66/73321B29C66/73362B29C65/1616Y10T428/25B29C65/1674B29C66/836B29C66/73921B29C66/73772B29C66/73776B29K2995/0027B29C66/71B29K2081/04B29K2077/00B29K2069/00B29K2067/00B29K2023/00
InventorKIHARA, TETSUJIYAMAMOTO, SATOSHI
OwnerORIENT CHEM INDS